CN209462589U - One kind is from circuit power switch device and earphone, speaker - Google Patents
One kind is from circuit power switch device and earphone, speaker Download PDFInfo
- Publication number
- CN209462589U CN209462589U CN201920229557.0U CN201920229557U CN209462589U CN 209462589 U CN209462589 U CN 209462589U CN 201920229557 U CN201920229557 U CN 201920229557U CN 209462589 U CN209462589 U CN 209462589U
- Authority
- CN
- China
- Prior art keywords
- audio
- capacitor
- resistance
- connect
- signal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Amplifiers (AREA)
- Circuit For Audible Band Transducer (AREA)
Abstract
The utility model belongs to electronic technology field, discloses a kind of from circuit power switch device and earphone, speaker, including Audio interface block, audio playing module, tone frequency channel wire detection module, Bluetooth control module, switch module and audio amplification block；Audio interface block receives the audio signal of tone frequency channel wire forwarding, and audio signal is forwarded；Audio playing module is played out according to audio signal；Tone frequency channel wire detection module detects signal according to the tone frequency channel wire that the insertion of tone frequency channel wire generates the first level；Bluetooth control module detects the control signal that signal generates third level according to the tone frequency channel wire of the first level；Switch module turns off power supply according to the control signal of third level；Audio amplification block stops working when power supply turns off；Therefore when terminal is connect by tone frequency channel wire with earphone or speaker, audio playing module is played out according only to audio signal, so that the noise that earphone or speaker play audio is small, improves the result of broadcast of earphone or speaker.
Description
Technical field
The utility model belongs to electronic technology field, more particularly to a kind of from circuit power switch device and earphone, speaker.
Background technique
Traditional earphone or speaker includes that Bluetooth control module, audio amplification block, audio playing module and audio connect
Mouth mold block.When terminal is connect by Bluetooth signal with earphone or speaker, Bluetooth control module receives Bluetooth communication signals, and root
Original audio signal is generated according to Bluetooth communication signals；Audio amplification block generates audio according to power supply and original audio signal
Amplified signal；Audio interface block forwards audio amplification signal；Audio playing module is played out according to audio amplification signal.When
When terminal connect by tone frequency channel wire with earphone or speaker, the audio signal that Audio interface block reception tone frequency channel wire forwards, and by institute
It states audio signal and is forwarded to audio playing module；Audio playing module is played out according to the audio signal.
However, when terminal is connect by tone frequency channel wire with earphone or speaker, since audio amplification block is still in work shape
State and output noise signal, audio playing module is played out according to noise signal and audio signal, so that earphone or speaker are broadcast
The noise of playback frequency is larger, and result of broadcast is poor.
Therefore traditional earphone or speaker can not turn off audio amplification block in the presence of when connecting by tone frequency channel wire with terminal
The noise for exporting and play audio with causing is larger, the poor defect of result of broadcast.
Utility model content
The utility model provides a kind of from circuit power switch device and earphone, speaker, it is intended to solve traditional from electricity
The power switch device existing output that audio amplification block can not be turned off when connecting by tone frequency channel wire with terminal in road causes
The noise that ground plays audio is larger, the poor problem of result of broadcast.
The utility model is realized in this way one kind is from circuit power switch device, it is described from circuit power switch device
Include:
For receiving the audio signal of tone frequency channel wire forwarding, and the audio signal is forwarded to the audio of audio playing module
Interface module；
It is connect with the Audio interface block, the audio for being played out according to the audio signal plays mould
Block；
It is connect with the Audio interface block, the tone frequency channel wire for generating the first level for the insertion according to the tone frequency channel wire is examined
Survey the tone frequency channel wire detection module of signal；
It is connect with the tone frequency channel wire detection module, generates third for detecting signal according to the tone frequency channel wire of first level
The Bluetooth control module of the control signal of level；
It is connect with the Bluetooth control module, for turning off opening for power supply according to the control signal of the third level
Close module；
It is connect with the switch module and the Audio interface block, for stopping work when the power supply turns off
The audio amplification block of work.
The tone frequency channel wire detection module includes the first transient voltage suppressor, first in one of the embodiments,
Resistance, second resistance and 3rd resistor；
First end, the first end of the first resistor, the second resistance of first transient voltage suppressor
First end and the first end of the 3rd resistor collectively form the input terminal of the tone frequency channel wire detection module, the third electricity
The second end of resistance is the output end of the tone frequency channel wire detection module, and the second end of the first resistor is connect with the first power supply, institute
The second end of the second end and the second resistance of stating the first transient voltage suppressor is connected to power ground altogether.
The Bluetooth control module includes Bluetooth control chip in one of the embodiments,；
First programmable data input/output terminal of the Bluetooth control chip is that the control of the Bluetooth control module is believed
Number output end, the cathode right channel of the positive right audio channel output end of the Bluetooth control chip, the Bluetooth control chip
The cathode of audio output, the positive left channel audio output end of the Bluetooth control chip and the Bluetooth control chip is left
Channel audio output end collectively forms the original audio signal output end of the Bluetooth control module, the Bluetooth control chip
Second programmable data input/output terminal is that the tone frequency channel wire of the Bluetooth control module detects signal input part.
The switch module includes the first field-effect tube, the second field-effect tube, the 4th electricity in one of the embodiments,
Resistance, the 5th resistance and the 6th resistance；
The source electrode of first field-effect tube is connect with the first end of the 4th resistance and the power supply, and described
The grid of one field-effect tube is connect with the drain electrode of the second end and second field-effect tube of the 4th resistance, and described first
The drain electrode of effect pipe is the power supply output end of the switch module, the grid of second field-effect tube and the 5th electricity
The first end of resistance is connected with the first end of the 6th resistance, and the second end of the 5th resistance is the control of the switch module
Signal input part, the second end of the 6th resistance and the source electrode of second field-effect tube are connected to power ground altogether.
The audio amplification block includes audio-frequency power amplifier, first capacitor, the second electricity in one of the embodiments,
Appearance, third capacitor, the 4th capacitor, the 5th capacitor, the 6th capacitor, the 7th capacitor, the 8th capacitor, the 7th resistance, the 8th resistance,
Nine resistance and the tenth resistance；
The power end of the audio-frequency power amplifier, the enable end of the audio-frequency power amplifier and the first capacitor
First end collectively form the first power supply input terminal of the audio amplification block, the first of the audio-frequency power amplifier
Gain selection end is connect with the first end of the first end of the 7th resistance and the 9th resistance, the audio-frequency power amplifier
The second gain selection end connect with the first end of the first end of the 8th resistance and the tenth resistance, the 7th resistance
Second end and the second end of the 8th resistance collectively form the second power supply input terminal of the audio amplification block, institute
The cathode left channel audio input terminal for stating audio-frequency power amplifier is connect with the first end of second capacitor, the audio power
The positive left channel audio input terminal of amplifier is connect with the first end of the third capacitor, and the audio-frequency power amplifier is born
Ultra-Right channel audio input terminal is connect with the first end of the 4th capacitor, the positive right channel sound of the audio-frequency power amplifier
Frequency input terminal is connect with the first end of the 5th capacitor, the second end of second capacitor, the second end of the third capacitor,
The second end of 4th capacitor and the second end of the 5th capacitor collectively form the original sound of the audio amplification block
Frequency signal input part, the left channel audio output end of the audio-frequency power amplifier and the right channel of the audio-frequency power amplifier
Audio output collectively forms the audio amplification signal output end of the audio amplification block, and the audio-frequency power amplifier is just
Power end is connect with the first end of the 6th capacitor, the negative power end of the audio-frequency power amplifier and the 7th capacitor
First end connection, the cathode of audio-frequency power amplifier capacitance terminal of going at express speed is connect with the first end of the 8th capacitor, described
The anode of audio-frequency power amplifier capacitance terminal of going at express speed is connect with the second end of the 8th capacitor, the audio-frequency power amplifier
Reference voltage end, the ground terminal of the audio-frequency power amplifier, the second end of the first capacitor, second capacitor second
The second end at end, the second end of the 6th capacitor and the 7th capacitor is connected to power ground altogether.
The Audio interface block is 3.5mm earphone interface in one of the embodiments,.
The audio playing module includes the first loudspeaker, the second loudspeaker, the second transition in one of the embodiments,
Voltage suppression diode and third transient voltage suppressor；
The first end of first loudspeaker, the first end of second transient voltage suppressor, described second are raised
The first end of the first end of sound device and the third transient voltage suppressor collectively forms the audio playing module
Audio amplification signal input terminal, the second end of first loudspeaker, the second end of second transient voltage suppressor,
The second end of the second end of second loudspeaker and the third transient voltage suppressor is connected to power ground altogether.
The utility model embodiment also provides a kind of earphone, and the earphone includes filling as above-mentioned from circuit power switch
It sets.
The utility model embodiment also provides a kind of speaker, and the speaker includes filling as above-mentioned from circuit power switch
It sets.
The utility model embodiment is by including Audio interface block, audio playing module, tone frequency channel wire detection module, bluetooth
Control module, switch module and audio amplification block；Audio interface block receives the audio signal of tone frequency channel wire forwarding, and by sound
Frequency signal is forwarded to audio playing module；Audio playing module is played out according to audio signal；Tone frequency channel wire detection module according to
The tone frequency channel wire that the insertion of tone frequency channel wire generates the first level detects signal；Bluetooth control module is detected according to the tone frequency channel wire of the first level
The control signal of signal generation third level；Switch module turns off power supply according to the control signal of third level；Audio is put
Big module stops working when power supply turns off；Therefore when terminal is connect by tone frequency channel wire with earphone or speaker, due to audio
Amplification module stops working and stops output signal, and audio playing module is played out according only to audio signal, thus earphone
Or the noise of speaker broadcasting audio is small, improves the result of broadcast of earphone or speaker.
Detailed description of the invention
It is novel in order to illustrate more clearly of the technical application in the utility model embodiment, it below will be in embodiment description
Required attached drawing is briefly described, it should be apparent that, the accompanying drawings in the following description is only the one of the utility model
A little embodiments for those of ordinary skill in the art without creative efforts, can also be according to these
Attached drawing obtains other attached drawings.
Fig. 1 is a kind of function structure chart provided by the embodiment of the utility model from circuit power switch device；
Fig. 2 is the exemplary circuit structure chart provided by the embodiment of the utility model from circuit power switch device.
Specific embodiment
It is practical new to this below in conjunction with attached drawing to keep the purpose of this utility model, technical solution and advantage clearer
Type embodiment is described in further detail.
Fig. 1 shows the modular structure provided by the embodiment of the utility model from circuit power switch device, for the ease of
Illustrate, illustrate only part relevant to the utility model embodiment, details are as follows:
It is above-mentioned from circuit power switch device include Audio interface block 01, audio playing module 02, tone frequency channel wire detection mould
Block 03, Bluetooth control module 04, switch module 05 and audio amplification block 06.
When being connect from circuit power switch device by tone frequency channel wire with terminal, Audio interface block 01 is for receiving audio
The audio signal of line forwarding, and audio signal is forwarded to audio playing module 02；Audio playing module 02 and audio interface mould
Block 01 connects, for being played out according to audio signal；Tone frequency channel wire detection module 03 is connect with Audio interface block 01, is used for root
Signal is detected according to the tone frequency channel wire that the insertion of tone frequency channel wire generates the first level；Bluetooth control module 04 and tone frequency channel wire detection module 03 connect
It connects, for detecting the control signal that signal generates third level according to the tone frequency channel wire of the first level；Switch module 05 and bluetooth control
Molding block 04 connects, for turning off power supply according to the control signal of third level；Audio amplification block 06 and switch module
05 and Audio interface block 01 connect, for stopping working when power supply turns off.
In specific implementation, when being connect from circuit power switch device by Bluetooth signal with terminal, Bluetooth control module
04 is also used to receive Bluetooth communication signals, and generates original audio signal according to Bluetooth communication signals；Tone frequency channel wire detection module 03
The tone frequency channel wire for being also used to generate second electrical level according to the extraction of tone frequency channel wire detects signal；Bluetooth control module 04 is also used to according to
The tone frequency channel wire detection signal of two level generates the control signal of the 4th level；Switch module 05 is also used to the control according to third level
Signal communication power supply processed；Audio amplification block 06 is also used to generate audio amplification according to power supply and original audio signal
Signal；Audio interface block 01 is also used to forward audio amplification signal；Audio playing module 02, which is also used to be amplified according to audio, to be believed
It number plays out.
Wherein, the first level and second electrical level reverse phase, third level and the 4th level inversion.
Fig. 2 shows the exemplary circuit structure provided by the embodiment of the utility model from circuit power switch device, in order to
Convenient for explanation, part relevant to the utility model embodiment is illustrated only, details are as follows:
Tone frequency channel wire detection module 03 includes the first transient voltage suppressor TVS1, first resistor R1, second resistance R2
And 3rd resistor R3；
The first end of first transient voltage suppressor TVS1, the first end of first resistor R1, second resistance R2
The first end of one end and 3rd resistor R3 collectively form the input terminal of tone frequency channel wire detection module 03, the second end of 3rd resistor R3
For the output end of tone frequency channel wire detection module 03, the second end of first resistor R1 is connect with the first power supply VAA, and the first transient electrical is constrained
The second end of diode TVS1 processed and the second end of second resistance R2 are connected to power ground altogether.
Bluetooth control module 04 includes Bluetooth control chip U1.
The first programmable data input/output terminal PIO18 of Bluetooth control chip U1 is that the control of Bluetooth control module 04 is believed
Number output end, the right sound of cathode of the positive right audio channel output end SPKR_RP of Bluetooth control chip U1, Bluetooth control chip U1
The positive left channel audio output end SPKR_LP and Bluetooth control core of channel audio output end SPKR_RN, Bluetooth control chip U1
The cathode left channel audio output end SPKR_LN of piece U1 collectively forms the original audio signal output end of Bluetooth control module 04,
The second programmable data input/output terminal PIO8 of Bluetooth control chip U1 is that the tone frequency channel wire of Bluetooth control module 04 detects signal
Input terminal.
Switch module 05 include the first field-effect tube M1, the second field-effect tube M2, the 4th resistance R4, the 5th resistance R5 and
6th resistance R6.
The source electrode of first field-effect tube M1 is connect with the first end of the 4th resistance R4 and power supply VBAT, the first field-effect
The grid of pipe M1 is connect with the drain electrode of the second end of the 4th resistance R4 and the second field-effect tube M2, the drain electrode of the first field-effect tube M1
For the power supply output end of switch module 05, the grid of the second field-effect tube M2 and the first end of the 5th resistance R5 and the 6th electricity
The first end connection of R6 is hindered, the second end of the 5th resistance R5 is the control signal input of switch module 05, the 6th resistance R6's
The source electrode of second end and the second field-effect tube M2 are connected to power ground altogether.
Audio amplification block 06 include audio-frequency power amplifier U2, first capacitor C1, the second capacitor C2, third capacitor C3,
4th capacitor C4, the 5th capacitor C5, the 6th capacitor C6, the 7th capacitor C7, the 8th capacitor C8, the 7th resistance R7, the 8th resistance R8,
9th resistance R9 and the tenth resistance R10.
The power end PVDD of audio-frequency power amplifier U2, the enable end EN of audio-frequency power amplifier U2 and first capacitor C1
First end collectively form the first power supply input terminal of audio amplification block 06, the first gain of audio-frequency power amplifier U2
Selection end G0 is connect with the first end of the first end of the 7th resistance R7 and the 9th resistance R9, and the second of audio-frequency power amplifier U2 increases
Benefit selection end G1 connect with the first end of the first end of the 8th resistance R8 and the tenth resistance R10, the second end of the 7th resistance R7 with
The second end of 8th resistance R8 collectively forms the second power supply input terminal of audio amplification block 06, audio-frequency power amplifier U2
Cathode left channel audio input terminal INL- connect with the first end of the second capacitor C2, the just ultra-Left sound of audio-frequency power amplifier U2
Channel audio input terminal INL+ is connect with the first end of third capacitor C3, the cathode right audio channel input of audio-frequency power amplifier U2
End INR- is connect with the first end of the 4th capacitor C4, the positive right audio channel input terminal INR+ of audio-frequency power amplifier U2 and the
The first end of five capacitor C5 connects, the second end of the second capacitor C2, the second end of third capacitor C3, the second end of the 4th capacitor C4
And the 5th the second end of capacitor C5 collectively form the original audio signal input terminal of audio amplification block 06, Audio power amplifier
The right audio channel output end OUTR of the left channel audio output end OUTL and audio-frequency power amplifier U2 of device U2 collectively form sound
The audio amplification signal output end of frequency amplification module 06, the positive power source terminal HPVDD and the 6th capacitor C6 of audio-frequency power amplifier U2
First end connection, the negative power end HPVSS of audio-frequency power amplifier U2 connect with the first end of the 7th capacitor C7, audio power
The cathode of the amplifier U2 capacitance terminal CAP- that goes at express speed is connect with the first end of the 8th capacitor C8, and the anode of audio-frequency power amplifier U2 flies
Capacitance terminal of speeding CAP+ is connect with the second end of the 8th capacitor C8, reference voltage end SGND, the audio function of audio-frequency power amplifier U2
The ground terminal PGND of rate amplifier U2, the second end of first capacitor C1, the second end of the second capacitor C2, the 6th capacitor C6 second
The second end of end and the 7th capacitor C7 are connected to power ground altogether.
Audio interface block 01 is 3.5mm earphone interface J1.
Audio playing module 02 includes the first loudspeaker SPK1, the second loudspeaker SPK2, two poles of the second transient voltage inhibition
Pipe TVS2 and third transient voltage suppressor TVS2.
The first end of first loudspeaker SPK1, the first end of the second transient voltage suppressor TVS2, the second loudspeaker
The first end of SPK2 and the first end of third transient voltage suppressor TVS3 collectively form the sound of audio playing module 02
Frequency amplified signal input terminal, the second end of the first loudspeaker SPK1, the second end of the second transient voltage suppressor TVS2,
The second end of two loudspeaker SPK2 and the second end of third transient voltage suppressor TVS3 are connected to power ground altogether.
It is described further below in conjunction with working principle to shown in Fig. 2:
In the specific implementation process, when being connect from circuit power switch device by tone frequency channel wire with terminal, 3.5mm earphone
Interface J1 receives the audio signal of tone frequency channel wire forwarding, and audio signal is forwarded to the first loudspeaker SPK1 and the second loudspeaker
SPK2；First loudspeaker SPK1 and the second loudspeaker SPK2 are played out according to audio signal；Simultaneously as 3.5mm earphone connects
Mouth J1 connects terminal by tone frequency channel wire and forms divider resistance, therefore the second end of 3rd resistor R3 is low according to the insertion of tone frequency channel wire generation
The tone frequency channel wire detection signal of level is simultaneously exported to the second programmable data input/output terminal PIO8 of Bluetooth control chip U1；Bluetooth
Chip U1 is controlled to generate low level control signal and export from the first programmable data input/output terminal PIO18；Second effect
Should pipe M2 cut-off, the grid grade current potential of the first field-effect tube M1 is high potential, ends the first field-effect tube M1, to turn off power supply
Power supply VBAT；When power supply VBAT shutdown, audio-frequency power amplifier U2 stops working.
When being connect from circuit power switch device by Bluetooth signal with terminal, it is logical that Bluetooth control chip U1 receives bluetooth
Believe signal, and generates original audio signal according to Bluetooth communication signals and exported from the positive right audio channel of Bluetooth control chip U1
Hold SPKR_RP, the cathode right audio channel output end SPKR_RN of Bluetooth control chip U1, Bluetooth control chip U1 it is just ultra-Left
The cathode left channel audio output end SPKR_LN of channel audio output end SPKR_LP and Bluetooth control chip U1 is exported, audio
The positive left channel audio input terminal of the cathode left channel audio input terminal INL- of power amplifier U2, audio-frequency power amplifier U2
The just ultra-Right sound of cathode the right audio channel input terminal INR- and audio-frequency power amplifier U2 of INL+, audio-frequency power amplifier U2
Channel audio input terminal INR+ receives original audio signal；Simultaneously as 3.5mm earphone interface J1 is connected eventually not over tone frequency channel wire
End forms divider resistance, therefore the second end of 3rd resistor R3 detects signal according to the tone frequency channel wire that the extraction of tone frequency channel wire generates high level
And it exports to the second programmable data input/output terminal PIO8 of Bluetooth control chip U1；Bluetooth control chip U1 generates high level
Control signal and from the first programmable data input/output terminal PIO18 export；Second field-effect tube M2 conducting, the first field-effect
The grid grade current potential of pipe M1 is pulled low to 0 current potential, and the first field-effect tube M1 is connected, thus the first field-effect tube M1 connection power supply electricity
Source VBAT；Audio-frequency power amplifier U2 according to power supply and original audio signal generates audio amplification signal and from audio power
The right audio channel output end OUTR of the left channel audio output end OUTL and audio-frequency power amplifier U2 of amplifier U2 export to
3.5mm earphone interface J1,3.5mm earphone interface J1 forwards audio amplification signal to the first loudspeaker SPK1 and the second loudspeaker
SPK2, the first loudspeaker SPK1 and the second loudspeaker SPK2 are played out according to audio amplification signal.
The utility model embodiment also provides a kind of earphone, and the earphone includes filling as above-mentioned from circuit power switch
It sets.
The utility model embodiment also provides a kind of speaker, and the speaker includes filling as above-mentioned from circuit power switch
It sets.
The utility model embodiment is by including Audio interface block, audio playing module, tone frequency channel wire detection module, bluetooth
Control module, switch module and audio amplification block；Audio interface block receives the audio signal of tone frequency channel wire forwarding, and by sound
Frequency signal is forwarded to audio playing module；Audio playing module is played out according to audio signal；Tone frequency channel wire detection module according to
The tone frequency channel wire that the insertion of tone frequency channel wire generates the first level detects signal；Bluetooth control module is detected according to the tone frequency channel wire of the first level
The control signal of signal generation third level；Switch module turns off power supply according to the control signal of third level；Audio is put
Big module stops working when power supply turns off；Therefore when terminal is connect by tone frequency channel wire with earphone or speaker, due to audio
Amplification module stops working and stops output signal, and audio playing module is played out according only to audio signal, thus earphone
Or the noise of speaker broadcasting audio is small, improves the result of broadcast of earphone or speaker.
The above is only the preferred embodiment of the present invention, is not intended to limit the utility model, all practical at this
Within novel spirit and principle, any modification, equivalent replacement, improvement and so on should be included in the guarantor of the utility model
Within the scope of shield.
Claims (9)
1. a kind of from circuit power switch device, which is characterized in that described to include: from circuit power switch device
For receiving the audio signal of tone frequency channel wire forwarding, and the audio signal is forwarded to the audio interface of audio playing module
Module；
It is connect with the Audio interface block, the audio playing module for being played out according to the audio signal；
It is connect with the Audio interface block, the tone frequency channel wire for generating the first level for the insertion according to the tone frequency channel wire detects letter
Number tone frequency channel wire detection module；
It is connect with the tone frequency channel wire detection module, generates third level for detecting signal according to the tone frequency channel wire of first level
Control signal Bluetooth control module；
It is connect with the Bluetooth control module, the switching molding of power supply is turned off for the control signal according to the third level
Block；
It is connect with the switch module and the Audio interface block, for what is stopped working when the power supply turns off
Audio amplification block.
2. as described in claim 1 from circuit power switch device, which is characterized in that the tone frequency channel wire detection module includes the
One transient voltage suppressor, first resistor, second resistance and 3rd resistor；
The first end of first transient voltage suppressor, the first end of the first resistor, the second resistance
The first end of one end and the 3rd resistor collectively forms the input terminal of the tone frequency channel wire detection module, the 3rd resistor
Second end is the output end of the tone frequency channel wire detection module, and the second end of the first resistor connect with the first power supply, described the
The second end of the second end of one transient voltage suppressor and the second resistance is connected to power ground altogether.
3. as described in claim 1 from circuit power switch device, which is characterized in that the Bluetooth control module includes bluetooth
Control chip；
First programmable data input/output terminal of the Bluetooth control chip is that the control signal of the Bluetooth control module is defeated
Outlet, the cathode right audio channel of the positive right audio channel output end of the Bluetooth control chip, the Bluetooth control chip
The cathode L channel of output end, the positive left channel audio output end of the Bluetooth control chip and the Bluetooth control chip
Audio output collectively forms the original audio signal output end of the Bluetooth control module, and the second of the Bluetooth control chip
Programmable data input/output terminal is that the tone frequency channel wire of the Bluetooth control module detects signal input part.
4. as described in claim 1 from circuit power switch device, which is characterized in that the switch module includes first effect
Ying Guan, the second field-effect tube, the 4th resistance, the 5th resistance and the 6th resistance；
The source electrode of first field-effect tube is connect with the first end of the 4th resistance and the power supply, and described first
The grid of effect pipe is connect with the drain electrode of the second end and second field-effect tube of the 4th resistance, first field-effect
The drain electrode of pipe is the power supply output end of the switch module, the grid of second field-effect tube and the 5th resistance
First end is connected with the first end of the 6th resistance, and the second end of the 5th resistance is the control signal of the switch module
Input terminal, the second end of the 6th resistance and the source electrode of second field-effect tube are connected to power ground altogether.
5. as described in claim 1 from circuit power switch device, which is characterized in that the audio amplification block includes audio
Power amplifier, first capacitor, the second capacitor, third capacitor, the 4th capacitor, the 5th capacitor, the 6th capacitor, the 7th capacitor,
Eight capacitors, the 7th resistance, the 8th resistance, the 9th resistance and the tenth resistance；
The of the power end of the audio-frequency power amplifier, the enable end of the audio-frequency power amplifier and the first capacitor
One end collectively forms the first power supply input terminal of the audio amplification block, the first gain of the audio-frequency power amplifier
Selection end is connect with the first end of the first end of the 7th resistance and the 9th resistance, and the of the audio-frequency power amplifier
Two gains selection end is connect with the first end of the first end of the 8th resistance and the tenth resistance, and the of the 7th resistance
The second end of two ends and the 8th resistance collectively forms the second power supply input terminal of the audio amplification block, the sound
The cathode left channel audio input terminal of frequency power amplifier is connect with the first end of second capacitor, the Audio power amplifier
The positive left channel audio input terminal of device is connect with the first end of the third capacitor, and the cathode of the audio-frequency power amplifier is right
Channel audio input terminal is connect with the first end of the 4th capacitor, and the positive right audio channel of the audio-frequency power amplifier is defeated
Enter end to connect with the first end of the 5th capacitor, it is the second end of second capacitor, the second end of the third capacitor, described
The second end of 4th capacitor and the second end of the 5th capacitor collectively form the original audio letter of the audio amplification block
Number input terminal, the left channel audio output end of the audio-frequency power amplifier and the right audio channel of the audio-frequency power amplifier
Output end collectively forms the audio amplification signal output end of the audio amplification block, the positive supply of the audio-frequency power amplifier
End is connect with the first end of the 6th capacitor, and the first of the negative power end of the audio-frequency power amplifier and the 7th capacitor
End connection, the cathode of audio-frequency power amplifier capacitance terminal of going at express speed are connect with the first end of the 8th capacitor, the audio
The anode of power amplifier capacitance terminal of going at express speed is connect with the second end of the 8th capacitor, the reference of the audio-frequency power amplifier
Voltage end, the ground terminal of the audio-frequency power amplifier, the second end of the first capacitor, the second end of second capacitor,
The second end of 6th capacitor and the second end of the 7th capacitor are connected to power ground altogether.
6. as described in claim 1 from circuit power switch device, which is characterized in that the Audio interface block is 3.5mm
Earphone interface.
7. as described in claim 1 from circuit power switch device, which is characterized in that the audio playing module includes first
Loudspeaker, the second loudspeaker, the second transient voltage suppressor and third transient voltage suppressor；
The first end of first loudspeaker, the first end of second transient voltage suppressor, second loudspeaker
First end and the first end of the third transient voltage suppressor collectively form the audio of the audio playing module
Amplified signal input terminal, it is the second end of first loudspeaker, the second end of second transient voltage suppressor, described
The second end of the second end of second loudspeaker and the third transient voltage suppressor is connected to power ground altogether.
8. a kind of earphone, which is characterized in that the earphone includes as claimed in any one of claims 1 to 7 from circuit power
Switching device.
9. a kind of speaker, which is characterized in that the speaker includes as claimed in any one of claims 1 to 7 from circuit power
Switching device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920229557.0U CN209462589U (en) | 2019-02-22 | 2019-02-22 | One kind is from circuit power switch device and earphone, speaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920229557.0U CN209462589U (en) | 2019-02-22 | 2019-02-22 | One kind is from circuit power switch device and earphone, speaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209462589U true CN209462589U (en) | 2019-10-01 |
Family
ID=68046846
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920229557.0U Active CN209462589U (en) | 2019-02-22 | 2019-02-22 | One kind is from circuit power switch device and earphone, speaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209462589U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111658319A (en) * | 2020-06-09 | 2020-09-15 | 烟台听雨医疗科技有限公司 | Tinnitus treatment device |
-
2019
- 2019-02-22 CN CN201920229557.0U patent/CN209462589U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111658319A (en) * | 2020-06-09 | 2020-09-15 | 烟台听雨医疗科技有限公司 | Tinnitus treatment device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN209462589U (en) | One kind is from circuit power switch device and earphone, speaker | |
| CN115720318A (en) | Automatic noise reduction circuit for sound equipment and control method | |
| CN200966099Y (en) | Mute circuit for set-top box | |
| CN203015092U (en) | Sound source output distribution system | |
| CN201216013Y (en) | Mute circuit for earphone | |
| CN203734823U (en) | Audio device | |
| CN114071322A (en) | Wireless and wired input earphone differential conversion common-ground device and common-ground method thereof | |
| CN201131052Y (en) | Circuit for automatically controlling output of external speaker | |
| CN206743524U (en) | Bluetooth module audio mute circuit | |
| CN207340171U (en) | A kind of audio isolating device and speaker | |
| CN209462588U (en) | A kind of shutdown noise absorber and earphone, speaker | |
| CN202496002U (en) | Audio signal outputting and processing circuit and television | |
| CN207995372U (en) | The acoustics circuit and sound system of sharing audio input terminal | |
| CN211063778U (en) | Audio playing circuit of network camera | |
| CN203482378U (en) | Active sound box | |
| CN107181997A (en) | A kind of audio de-noising circuit and with wheat audio amplifier | |
| CN110120796B (en) | Voice signal amplifying and filtering circuit | |
| CN204794911U (en) | Little signal amplification circuit system of analog audio | |
| CN208891026U (en) | Earphone removes POPO system for electrical teaching | |
| CN218633868U (en) | Voltage self-adaptive audio power amplifier | |
| CN201528381U (en) | Set-top box on-off mute circuit | |
| CN203167249U (en) | Power-on mute control circuit | |
| CN221127249U (en) | Impact-proof circuit for power amplifier of broadcasting terminal | |
| CN206835344U (en) | The high imported circuit for reducing sound damage | |
| CN218514491U (en) | 100W to 150W power level mobile sound |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |